Weft stop motion for narrow fabric looms



Dec. l, 1953 M. slEGEl. 2,651,028

WEF'T STOP MOTION FOR NARROW FABRIC LOOMS Filed Dec. s, 1942 2 Sheets-Sheet l MELVIN SIEGEL,

ATTORNEY M. SIEGEL WEFT STOP MOTION FOR NARROW FABRIC LOOMS Dec. 1, 1953 2 Sheets-Sheet 2 Filed Dec'l 3, 1942 POWER INVENTOR v MELVIN SIEGEL,

ATTORN EY FIG. 5.

Patented Dec. 1, 1953 UNITED STATES PATENT OFFICE WEFT STOP MOTION FOR NARROW FABRIC LOOMS 2 Claims.

This invention relates to a means upon a loom for automatically stopping same when the weft yarn supply upon a bobbin or quill in a shuttle becomes exhausted and bares the quill. The invention has particular reference to looms which weave ribbons, tapes, labels, elastics, or other narrow fabrics having a plurality of bobbin carrying shuttles all operating at the same time.

When a quill carrying a weft yarn becomes empty and the loom continues running, imperfect fabric results. The loom must be constantly watched for empty weft quills.

The object of this invention, is therefore, to provide a means for stopping the loom or indicating when the weft yarn supply is exhausted. An electrical circuit with the quill of an exhausted weft yarn to actuate a switch in the power line, is employed.

A master shuttle is provided upon which there is mounted a quill having a weft yarn several yards shorter than all other weft yarns upon all other quills operating upon the loom, and providing the said master shuttle with electrical terminals which, when the weft yarn is exhausted, permit a finger or trigger, normally engaging the weft yarn which provides tension, to contact a metal core upon the quill, thus completing an electrical circuit through the bow or bridge wires on the shuttle and contact nger on the block.

This closed low voltage electric circuit operates a A relay or solenoid switch and opens a power circuit to stop the motor which drives the loom. This electrical circuit may also stop the loom through a mechanical linkage actuated by a solenoid, but not shown.

A further object resides in the provision of a signal or alarm means to indicate the stoppage of the loom.

A still further object of this invention is the provision of an assembly in which the constituent f elements are so arranged structurally and functionally as to assure improved results with materials and members which may be manufactured at reasonable cost, may be easily assembled and which will be eilicient in operation with minimum .l

wear to the parts.

The best embodiment of the invention has been chosen for illustrative purposes, but this embodiment should be viewed as being illustrative only and not as limiting because obviously the inveny tion is capable of other embodiments having revised details of construction, so long as they fall within the ambit of the appended claims.

The invention itself, however, both as to its organization and its method of operation, will best be understood from the following description of a specific embodiment when read in connection with the accompanying drawings, in which:

Fig. 1 is a top or planview showing a shuttle partly broken away, and showing a portion of the hatten upon a loom.

Fig. 2 is a front view, partly in section, the sectional portion being taken along a plane indicated by the line 2-2 of Fig. 1.

Fig. 3 is a side elevational view looking in the direction indicated by the arrow X in Fig. 1 lshowing portions of the batteri of a loom, in section, and diagrammatically shows the electrical circuit employed.

Fig. 4 is a fragmentary detail of a part of the shuttle and is taken in a plane approximately along line 4-4 of Figs. 1 and 2.

Fig. 5 is a fragmentary detail of a part of the shuttle taken along line 5-5 of Figs. 1 and 2, and

Fig. 6 is a fragmentary detail similar to Fig. 4, but shows a modified form.

`Referring to the parts in detail wherein similar reference numerals represent similar parts throughout, lil and I2 represent parts of supporting metal cross bars of the batten on a loom; lll is a rack having reciprocal movements within the grooved beam I6. Wooden shuttle blocks 26, having arcuate or straight grooves 22, are secured upon the cross bars Hi and I2 by means of screws 24 and 26 respectively. Wooden shuttles Z8, having grooved inner bases conforming to the arcuate grooves 22 upon the shuttle blocks Eil, are reciprocally movable upon the said lshuttle blocks and are formed with recessed rack 3i) (Fig. 3) which are engageable with pinion gears 32 mounted upon the shuttle blocks 2D. rlhe said pinion gears 32, by their engagement with the reciprocating rack I4, impart reciprocal movement to the said shuttles. When the rack moves in the direction indicated by the arrow A the shuttles will move in the direction indicated by the arrow A. When the rack M moves in an opposite direction or as indicated by the arrow B the shuttles will move in the direction indicated by the arrow B (Fig. 2). Reciprocal movement is imparted to the rack by straps, pulleys and levers or by any conventional means (not shown).

A metal quill 34, around which the weft yarn (not shown) is wound is carried upon a metal shaft 36 which is held at one end in a metal bushing 33 which is formed with an outwardly extending portion 4D and at its other or opposite end is held in a groove 42. The portion Si has a bore to receive one end of a bow wire t while its opposite end engages in a bore in the shuttle 28, as 

